The filioque clause or more appropriately the
filioque controversy has to do with the Latin phrase, translated "and the son", which was accepted as an addition to the
Nicene Creed by the Western churches and subsequently opposed by the Eastern churches:
The Nicene Creed as confirmed by the First Council of Constantinople in 381:
"We believe in the Holy Spirit, the Lord, the giver of life, who proceeds from the Father. Who with the Father and the Son is worshiped and glorified." The Nicene Creed with the "filioque" as accepted by the Western churches after
the Synod of Toledo in Spain in 589:
"We believe in the Holy Spirit, the Lord, the giver of life, who proceeds from the Father and the Son. Who with the Father and the Son is worshiped and glorified." The theological dispute between the Eastern and Western Church
is somewhat subtle, dealing with the persons of the Godhead and the nature of the Trinity. However, it was a continuing source of friction between the east and the west and was eventually elevated to become one of the "official"
causes of the
Great Schism in 1054 A.D.